Cleaning apparatus for boilers



Aug. 20, 1935. W. l.. MARS u CLEANING APPARATUS FOR BOILERS Filed July 17, 1953 2 SheJCS-Sheet l mw u mw l /ff /l Ira-men;

Aug. 20, 1935. W L, MARS I LSQ CLEANING APPARATUS FOR BOILERS Filed JulyV 17, 1955 2 Sheets-Sheet 2 f1/vena@ Patented Aug. 20, v1935 PATENT oFFicE,

CLEANING APPARATUSFOR Bomans William L'Mars, Brfaio, N.;Y. Application JulyY 17, 1933,'seria1 No. eso-.705

1 Claim.

This invention relates generally to steam boilers but more particularly to lan apparatus therefor for removing those elements fromj the circulating water whichiproduce sediment and scale 5 within the boiler.

It has for one of its objects to provide an efficient apparatus of this. character which will ef-V fectually and thoroughly. remove sediment and foreign matter from the water during its circulation .through the boilerl, and thereby increase the circulation of the water in the boiler and obtain themaximum heat transfer andV steam generation with a minimum consumption of fuel.

Another Vobject of the invention is the provision of a cleaning apparatus for boilers which is simple and inexpensive in construction, which is positive, reliable -and automatic in operation, and which is not liable to get out of order.

Other features of the invention reside in the construction and arrangement of parts hereinafter described and particularly pointed out in the appended claim. v

In the accompanying drawings:-

Figure 1 is a vertical sectional view of a boiler showing my improved apparatus applied thereto. Figure 2 is an enlarged longitudinal section of the apparatus showing its connection to the upper drum or header of the boiler. Figure 3 is a cross section taken on line 3 3, Figure 2.

Similar characters of reference indicate corresponding parts throughout the several views.

By way of example, I have shown my invention in connection with a water tube boiler, wherein I0 indicates the body thereof, II the combustion chamber, I2 the ash pit, and I3 the tube chamber communicating with the combustion chamber through the ue III and with the stack (not shown) through the ue I5, said chamber containing a bridge or bale wall I6 for effecting the proper circulation of the hot gases through the tube chamber. Disposed at the opposite ends of the chamber I3 are the customary upper and lower tube-drums or domes Il and IB, respec tively, which are connected to each other by the water tubes I9. Y

The cleaning apparatus for effecting the removal of those elements in the Water, such as alkali, magnesium and lime which cause the formation of scale on the boiler tubes, as Well as other foreign matter, is so designed and operatively associated with the boiler as to effect the cleansing and purification of the water during its circulation through the boiler. In its preferred construction shown in the drawings, the cleaning apparatus is constructed as follows:-

mersed in the water contained within the drum,

is a chamber for receiving and conducting water from the pump line and top of the boiler to the cleaner and which may be inthe form of a horiyzontally-disposed tank or cylinder 2t having an inlet at one end connected to the feed waterinlet pipe 2 Ir ofthe boiler and an outlet at its cpposite end to which a pipe 22 is connected for conducting the water to a cleaner or sediment collector-.indicated generally bythe numeral 23, the latterinturn being connected to the lower drum I8 by'apipe 24, whereby a continuous circulation of water is effected through the receiving chamber, the cleaner and the boiler. rIhis chamber, being` positioned within the upper drum, functions toV quickly heat the water fed thereto and thereby separates the scale-forming elements from the Water, these elements being converted into a collective mass or body and removed from the water as it is circulated through the cleaner or sediment collector 23 on its return flow to the lower drum` I8. v

'I'he receiving chamber 2D, in addition to being connected to the feed water line of the boiler, also communicates with the water in the upper drum I1 through the medium of a substantially funnel-shaped receiver or skimming device 25 `which is is disposed over the chamber with its mouth at or slightly below the normal level of the water in the drum, whereby this device skims off or removes any foreign matter which collects on the surface of the water in said drum. This skimming device is connected by a pipe 26 with the inlet end of the chamberZIl, and as seen in Figure 2, the discharge end of this pipe is arranged in inductive relation to the discharge end of the feed water inlet pipe 2 I, whereby, as the water is forced through said pipe 2I by pump pressure, a vacuum is set up which acts to draw the water and the foreign matter collected on the surface thereof from the drum Il into the chamber. As shown in Figure 2, the pipe 2| terminates in a contracted or nozzle-end 2l which extends beyond the discharge end of the pipe 26 to produce the induced effect desired.

The cleaner or sediment collecting device 23, which is located below the upper drum I 1 and interposed between the chamber 20 and the lower drum I8, preferably consists of a cylindrical tank or casing 28 into which the water from the pipe 22 flows by gravity. The lower or discharge end of said pipe terminates in a distributing head 29 having pipes 30 which are connected at different cepted by' the bates 32 therein and'eventually settles to the bottom of the tank where it may' be withdrawn from time to time through a drain orV valved blow off pipe 33. Connected to the upper end of the cleaning tank and infcom'munication with the corresponding end of the'drum 3l is a discharge pipe 34 which leads to the pipe 24 connected to the lower boiler-drum I8.

It will be noted that the circulation ofthe water in the boiler and the cleaner 23 is upward, whereby all lighter-than-water foreign matter is Vraised tothe surface of the normal water level of the boiler for removal through the skimming device 25, the chamber 2D and thecleaner,with the result that the scale-forming elements in the water are withdrawn and prevented from continuously circulating through the boiler and. impairing its eiciency.

Should it be desired to effect the removal of the cleaner for any reason without interfering with the operation of the boiler,` I provide a bypass or branch pipe 35 which connects the pipe eign matter.'

22 with the lower drum I8. In this pipe is arranged a valve 36 and in the pipe 22 beyond the connection thereof with said branch pipe 35 is a valve 31,'whereby the flow of water to the boilerdrum I8 or cleaner 23 is controlled.

I claim as my invention:-

In an apparatus of the character described, the combination of upper and lower water circulating pipes connected to the corresponding circulating elements of a boiler, respectively, the connection between the upper circulatingpipe and upper cir culating element of the boiler consisting of a skimming device disposed in the upper circulating element of the boiler in proximity to the Water level therein for removing foreign matter therefrom, forcing means associated with said skimmer and one end of said upper water circulating pipe and arranged to create circulation from said upper boiler circulating element through said skimmer `per water circulating pipe is connected and a collecting drum of substantially conical shape for the foreign matter disposed in said tank, said drum opening at its flared bottom into said tank and `connected at its upper end to the lower circulating pipe, whereby thewater is circulated downwardly through the tank and upwardly ythrough the collecting drum, the latter having baffles extending into the interior thereof for intercepting the forz WILLIAM L. MARS. 

